102,054 research outputs found
G. Stanley Hall: Ausgewählte Beiträge zur Kinderpsychologie und Pädagogik. Übersetzt von J. Stimpfl. Internat. Bibl. für Päd. IV. Altenburg, Oskar Bonde 1902. 455 S.
No full textG. STANLEY HALL: AUSGEWÄHLTE BEITRÄGE ZUR KINDERPSYCHOLOGIE UND PÄDAGOGIK. ÜBERSETZT VON J. STIMPFL. INTERNAT. BIBL. FÜR PÄD. IV. ALTENBURG, OSKAR BONDE 1902. 455 S.
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (-)
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (38) (a0001)
G. Stanley Hall: Ausgewählte Beiträge zur Kinderpsychologie und Pädagogik. Übersetzt von J. Stimpfl. Internat. Bibl. für Päd. IV. Altenburg, Oskar Bonde 1902. 455 S. (38) (p0078
ANTARCTIC FRO90011 LODRANITE - COOLING HISTORY FROM PYROXENE CRYSTAL-CHEMISTRY AND MICROSTRUCTURE
No full textThe Antarctic FR090011 lodranite shows an achondritic coarse granoblastic texture with an approximately chondritic composition. The crystal chemistry of Pbca and C2/c pyroxene single crystals and the TEM texture of Pbca pyroxene were investigated to reconstruct the evolutionary history of the meteorite parent body. The structural behaviour of orthopyroxene (En(85)Fs(12.4)Wo(2.6)) is well constrained in the En-Fs trend. Orthopyroxene Fe2+-Mg ordering in the M1 and M2 sites yields a closure temperature (T-c) of 570 +/- 20 degrees C and a cooling rate 10 degrees C/day near the T-c. Clinopyroxene is a low-iron augite (En(51)Fs(5)Wo(44)). Clinopyroxene Fe2+-Mg ordering in the M1 and M2 sites yields a T-c of 513 +/- 50 degrees C, which is compatible with the coaling rate derived from the orthopyroxene crystals. TEM investigation on orthopyroxene showed a few thin lamellae not larger than 20 Angstrom parallel to (100) and rare one unit cell Guinier-Preston zones. TEM-EDS analysis did not reveal significant chemical differences between lamella-rich and lamella-free zones. The above data are interpreted as being due to fast cooling resulting from radiative heat loss of small fragments ejected from a parent body, which were subsequently reassembled into a larger body
Mechatronic Handling Solution for a Robotized Pizza-Chef Assistant
No full textIn the Industry 4.0 context, advanced mechatronic solutions are more and more adopted also outside the manufacturing field, e.g. food. Being pizza one of the most spread foods worldwide and since not all the tasks for preparing it need the dexterity of a pizza-chef, e.g. topping, an autonomous collaborative robot helping the pizza-chef would represent a possible and effective support solution. However, a crucial aspect in handling the ingredients for topping is the selection of a proper end-effector. Indeed, foodstuff is usually characterized by non-uniform shapes and dimensions as well as it is soft and/or fragile. As first step for conceiving and testing an intelligent (collaborative) robotic pizza topping system, this paper firstly investigates the commercially available low-cost grippers able to deal with foodstuff. Starting from this analysis, a versatile ad-hoc designed gripper able to handle most of the ingredient typically used for topping pizzas has been designed and tested
Orthopyroxene from the Serra de Magé meteorite: structure refinement and estimation of C2/c pyroxene contributions to apparent Pbca diffraction violations
No full text
TEM TEXTURE AND X-RAY SINGLE-CRYSTAL STUDY OF SERRA-DE-MAGE ORTHO-PYROXENE
No full textA combined Transmission Electron Microscopy (TEM), X-ray single crystal diffraction (XRD) and microprobe study was undertaken on the orthopyroxene of Serra de Mage feldspar cumulate eucrite. Two single crystals, natural and equilibrated at several temperatures, were examined in order to identify the true symmetry of the orthopyroxene and to estimate the cooling history of the meteorite. TEM texture analysis showed augite lamellae larger than 500 A irregularly spaced within the orthopyroxene matrix, with orientation parallel to (100). XRD data were collected using a four-circle diffractometer. Structural refinement carried out in space group Pbca converged to a discrepancy factor of R = 2.81%. Because of the presence of some Okl 'forbidden' reflections that may be explained either by P21ca symmetry of the orthopyroxene or by overlap of reflections from the exsolved C2/c clinopyroxene, structural refinement in space group P21ca was also attempted. The resulting discrepancy factor was very close to that obtained in Pbca; however, the anomalous values of many thermal parameters and cation-oxygen bond distances do not support the choice of the P21ca space group. Calibration or KD (KD = (Fe(2+) + Mn)M1(MgM2/(Fe(2+) + Mn)MZMgM1) vs. 1/T gave a closure temperature Tc for the intracrystalline Fe(2+)-Mg exchange reaction of about 470 C, consistent with a relatively slow cooling rate
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Ortho-pyroxene From the Serra De Mage Meteorite - Structure Refinement and Estimation of C2/c Pyroxene Contributions To Apparent Pbca Diffraction Violations
No full textTransmission electron microscopy (TEM) of microstructures in the orthopyroxene of the Serra de Mage cumulate eucrite shows augite lamellae thicker than 500 Angstrom, irregularly spaced within the orthopyroxene matrix and parallel to (100), with a(Opx)* = a(Aug)*, [101](Opx)*, = c(Aug)*, and b(Opx)* = b(Aug)*. Streaking along a* owing to stacking disorder was observed in selected-area electron diffraction (SAD) patterns. Slabs of clinopyroxene were observed, but no Guinier-Preston zones were detected. Single-crystal X-ray diffraction (XRD) data were collected and structure refinements completed in space group Pbca, converging to R(obs) = 2.81 and 5.17% for the two samples. Because of the presence of some Okl forbidden reflections with k = 2n + 1 and l = 4n + 2, structure refinement was attempted in space group P2(1)ca, as suggested by previous studies, and in space groups P12(1)/c1 and P112(1)/a, as suggested by the Laue symmetry of the reflections, which is 2/m rather than mmm. However, the high residual indices R and the anomalous values of many displacement parameters and bond distances did not support the lower-symmetry space groups. The violations of the extinction conditions of the Pbca space group and the monoclinic symmetry of the reflections are due to overlap of reflections from the C2/c augite lamellae. From the intensity of the reflections forbidden in Pbca space group, the calculated augite content ranges from approximately 4 to 12%
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
